#left-choose {
  margin-top: 60px;
  margin-left: 30px;
  width: 15%;
  height: 45%;
  position: fixed;
  left: 0;
  background-color: white;
  border-radius: 10px;
  border: 3px solid rgba(0,0,0,0.12);
  box-shadow: 0 -4px 8px rgba(0,0,0,0.12),0 4px 8px rgba(0,0,0,0.04) 
}

.title {
  color: black;
  font-weight: bold;
  font-size: 20px;
  margin-top: 10px;
  margin-bottom: 10px; 
  text-align: center
}

.title span {
  background-color: #FAFAFA;
  padding: 2px 5px;
  border: 3px solid #DBDBDB;
  border-radius: 5px;
}

.el-tree {
  background: white	;
  --el-tree-node-hover-background-color: #FAFAFA;
  --el-tree-font-color: var(--el-text-color-regular);
  --el-tree-expand-icon-color: var(--el-text-color-placeholder);
}